64684032 has 136 divisors (see below), whose sum is σ = 201325056. Its totient is φ = 18087936.

The previous prime is 64684013. The next prime is 64684033. The reversal of 64684032 is 23048646.

It is a junction number, because it is equal to n+sod(n) for n = 64683984 and 64684002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64684033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1376233 + ... + 1376279.

Almost surely, 2^64684032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64684032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100662528).

64684032 is an abundant number, since it is smaller than the sum of its proper divisors (136641024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64684032 is an frugal number, since it uses more digits than its factorization.

64684032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 64684032 is about 8042.6383730714. The cubic root of 64684032 is about 401.4200195623.

The spelling of 64684032 in words is "sixty-four million, six hundred eighty-four thousand, thirty-two".